In this thesis, various problems in the quantum theory of relaxation are considered. We first discuss the dynamics of low temperature tunneling in condensed phases. With the aid of a varational unitary transformation, we are able to study the limits of both weak and strong coupling of the tunneling system to the environment. Next we discuss the physical implications of the standard Redfield equ...

When an unusually gifted scientist passes away prematurely, and when her friendship was so widely treasured , the intensity of sadness is difficult to convey. Cecile Pickart shaped the ubiquitin field for over two decades with equal parts creativity, rigor, and fairness (see photo). Her finest work centered on the polyubiquitin chain, the primary signal for protein degradation by the proteasome...

A Senna spectabilis (Fabaceae-Caesalpinioideae) é uma espécie arbórea que ocorre no norte de Minas Gerais e Nordeste brasileiro, presente em formações caatinga com solos profundos drenados. Possui importância econômica como madeireira, medicina caseira, planta ornamental, restauração florestal, sistemas agroflorestais forrageira. O estudo objetivou-se conhecer o efeito dos Microrganismos Eficie...

This paper proposes that the ways in which “civil society” engages with the multiple applications of human genomics, from proteomics to PGD, can be understood as the behaviour of a “social movement society” (Meyer and Tarrow 1998). Initial findings to date indicate that to construct any actor group as simply “pro” or “anti” biotechnology fails to map the sophistication, range, contextdependency...

We present a method which provides unified framework for most stability theorems that have been proved in graph and hypergraph theory. Our main result reduces large class of problems to the simpler question checking H with minimum degree omits forbidden structures is vertex-extendable. This means if v vertex H−v subgraph extremal configuration(s), then also configuration(s). In many cases verte...